Question

PM
Q.16)
The energy required to break the attraction between the
like molecules is known as (1 marks )
Ans.
Detergency
Free energy
Work of cohesion
Work of Adhesion
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Answer 1

Answer:

free energy is required to break the attraction between the like molecular

Answer 2

The right response to the question is 3rd option: Work of Cohesion.

• When two molecules of the same nature are attracted to each other, a force called cohesion exists between them.
• When similar molecules must be separated or energy is required to overcome the attraction force, work is completed. It's known as a work of cohesion.
• It is erroneous here since the work of adhesion occurs when energy is required to disrupt attraction between molecules of different natures.
• Because it is concerned with the process of eliminating dirt, detergency is wrong here.
• The energy required by the system to perform beneficial work is known as free energy.
• Hence, the cohesion work is proper in the context of the question.